Definitely two sets for Indian Troops, to cover the span of 4500 years is tremendously little
. Only one of the succesor kingdoms in the east of India would have used some hellenstical outfit, and it lasted very little.
The problem with the Hat Indians is basically their "physiology", they look a bit strange among other figures. King Porus set of lucky toys is very nice, but you have to buy 5 boxes to get some semblance of an army!